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Posted to issues@hbase.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2013/03/01 02:34:11 UTC
[jira] [Commented] (HBASE-7721) Atomic multi-row mutations in META
[ https://issues.apache.org/jira/browse/HBASE-7721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13590156#comment-13590156 ]
Hadoop QA commented on HBASE-7721:
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{color:red}-1 overall{color}. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12571505/hbase-7721_v1.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author tags.
{color:green}+1 tests included{color}. The patch appears to include 15 new or modified tests.
{color:green}+1 hadoop2.0{color}. The patch compiles against the hadoop 2.0 profile.
{color:red}-1 javadoc{color}. The javadoc tool appears to have generated 1 warning messages.
{color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings.
{color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings.
{color:red}-1 lineLengths{color}. The patch introduces lines longer than 100
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.coprocessor.TestMasterCoprocessorExceptionWithRemove
org.apache.hadoop.hbase.coprocessor.TestMasterCoprocessorExceptionWithAbort
Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/4614//console
This message is automatically generated.
> Atomic multi-row mutations in META
> ----------------------------------
>
> Key: HBASE-7721
> URL: https://issues.apache.org/jira/browse/HBASE-7721
> Project: HBase
> Issue Type: Improvement
> Components: Coprocessors, regionserver
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 0.95.0, 0.98.0
>
> Attachments: hbase-7721_v1.patch
>
>
> Thanks to Lars' local transactions patch (HBASE-5229), we can entertain the possibility of doing local transactions within META regions.
> We need this mainly for region splits and merges. Clients scan the META concurrent to the split/merge operations, and to prevent the clients from seeing overlapping region boundaries or holes in META, we just through hoops. For more backgroun, see BlockingMetaScannerVisitor, HBASE-5986, and my comments at https://reviews.apache.org/r/8716/.
> Now, for the actual implementation options:
> 1. As outlined in http://hadoop-hbase.blogspot.com/2012_02_01_archive.html,
> - We have to implement a Custom RegionSplitPolicy for the META regions to ensure that a table's regions are always co-located in the same META region. Then we can add MultiRowMutationEndpoint as a system level coprocessor, and use it for META operations.
> 2. Do smt like HBASE-7716, and expose local atomic multi-row operations as a native API.
> 3. Move META to zookeeper. Use zookeeper.multi.
> Then we can change region split / merge logic to make use of atomic META operations.
> Thoughts, suggestions?
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